[PATCH][libstc++v3]Add new dg-require-thread-fence directive.

libstdc++-v3/

2015-04-22  Renlin Li  <renlin.li@arm.com>

	* testsuite/lib/dg-options.exp (dg-require-thread-fence): New.
	* testsuite/lib/libstdc++.exp (check_v3_target_thread_fence): New.
	* testsuite/29_atomics/atomic_flag/clear/1.cc: Use it.
	* testsuite/29_atomics/atomic_flag/test_and_set/explicit.cc: Likewise.
	* testsuite/29_atomics/atomic_flag/test_and_set/implicit.cc: Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@222324 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index f285f8c..12f87c3 100644 (file)
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,11 @@
+2015-04-22  Renlin Li  <renlin.li@arm.com>
+
+       * testsuite/lib/dg-options.exp (dg-require-thread-fence): New.
+       * testsuite/lib/libstdc++.exp (check_v3_target_thread_fence): New.
+       * testsuite/29_atomics/atomic_flag/clear/1.cc: Use it.
+       * testsuite/29_atomics/atomic_flag/test_and_set/explicit.cc: Likewise.
+       * testsuite/29_atomics/atomic_flag/test_and_set/implicit.cc: Likewise.
+
 2015-04-21  Jonathan Wakely  <jwakely@redhat.com>
 
        * doc/xml/manual/configure.xml: Update descriptions of options

diff --git a/libstdc++-v3/testsuite/29_atomics/atomic_flag/clear/1.cc b/libstdc++-v3/testsuite/29_atomics/atomic_flag/clear/1.cc
index 0a4219c..a6e2299 100644 (file)
--- a/libstdc++-v3/testsuite/29_atomics/atomic_flag/clear/1.cc
+++ b/libstdc++-v3/testsuite/29_atomics/atomic_flag/clear/1.cc
@@ -1,4 +1,5 @@
 // { dg-options "-std=gnu++11" }
+// { dg-require-thread-fence "" }
 
 // Copyright (C) 2009-2015 Free Software Foundation, Inc.
 //

diff --git a/libstdc++-v3/testsuite/29_atomics/atomic_flag/test_and_set/explicit.cc b/libstdc++-v3/testsuite/29_atomics/atomic_flag/test_and_set/explicit.cc
index 2ff740b..0655be4 100644 (file)
--- a/libstdc++-v3/testsuite/29_atomics/atomic_flag/test_and_set/explicit.cc
+++ b/libstdc++-v3/testsuite/29_atomics/atomic_flag/test_and_set/explicit.cc
@@ -1,4 +1,5 @@
 // { dg-options "-std=gnu++11" }
+// { dg-require-thread-fence "" }
 
 // Copyright (C) 2008-2015 Free Software Foundation, Inc.
 //

diff --git a/libstdc++-v3/testsuite/29_atomics/atomic_flag/test_and_set/implicit.cc b/libstdc++-v3/testsuite/29_atomics/atomic_flag/test_and_set/implicit.cc
index 6ac20c0..a867da2 100644 (file)
--- a/libstdc++-v3/testsuite/29_atomics/atomic_flag/test_and_set/implicit.cc
+++ b/libstdc++-v3/testsuite/29_atomics/atomic_flag/test_and_set/implicit.cc
@@ -1,4 +1,5 @@
 // { dg-options "-std=gnu++11" }
+// { dg-require-thread-fence "" }
 
 // Copyright (C) 2008-2015 Free Software Foundation, Inc.
 //

diff --git a/libstdc++-v3/testsuite/lib/dg-options.exp b/libstdc++-v3/testsuite/lib/dg-options.exp
index 38c8206..56ca896 100644 (file)
--- a/libstdc++-v3/testsuite/lib/dg-options.exp
+++ b/libstdc++-v3/testsuite/lib/dg-options.exp
@@ -115,6 +115,15 @@ proc dg-require-cmath { args } {
     return
 }
 
+proc dg-require-thread-fence { args } {
+    if { ![ check_v3_target_thread_fence ] } {
+       upvar dg-do-what dg-do-what
+       set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
+       return
+    }
+    return
+}
+
 proc dg-require-atomic-builtins { args } {
     if { ![ check_v3_target_atomic_builtins ] } {
        upvar dg-do-what dg-do-what

diff --git a/libstdc++-v3/testsuite/lib/libstdc++.exp b/libstdc++-v3/testsuite/lib/libstdc++.exp
index b2f7d00..6a6374a 100644 (file)
--- a/libstdc++-v3/testsuite/lib/libstdc++.exp
+++ b/libstdc++-v3/testsuite/lib/libstdc++.exp
@@ -1221,6 +1221,62 @@ proc check_v3_target_cmath { } {
     return $et_c99_math
 }
 
+proc check_v3_target_thread_fence { } {
+    global cxxflags
+    global DEFAULT_CXXFLAGS
+    global et_thread_fence
+
+    global tool
+
+    if { ![info exists et_thread_fence_target_name] } {
+       set et_thread_fence_target_name ""
+    }
+
+    # If the target has changed since we set the cached value, clear it.
+    set current_target [current_target_name]
+    if { $current_target != $et_thread_fence_target_name } {
+       verbose "check_v3_target_thread_fence: `$et_thread_fence_target_name'" 2
+       set et_thread_fence_target_name $current_target
+       if [info exists et_thread_fence] {
+           verbose "check_v3_target_thread_fence: removing cached result" 2
+           unset et_thread_fence
+       }
+    }
+
+    if [info exists et_thread_fence] {
+       verbose "check_v3_target_thread_fence: using cached result" 2
+    } else {
+       set et_thread_fence 0
+
+       # Set up and preprocess a C++11 test program that depends
+       # on the thread fence to be available.
+       set src thread_fence[pid].cc
+
+       set f [open $src "w"]
+       puts $f "int main() {"
+       puts $f "__atomic_thread_fence (__ATOMIC_SEQ_CST);"
+       puts $f "return 0;"
+       puts $f "}"
+       close $f
+
+       set cxxflags_saved $cxxflags
+       set cxxflags "$cxxflags $DEFAULT_CXXFLAGS -Werror -std=gnu++11"
+
+       set lines [v3_target_compile $src /dev/null executable ""]
+       set cxxflags $cxxflags_saved
+       file delete $src
+
+       if [string match "" $lines] {
+           # No error message, linking succeeded.
+           set et_thread_fence 1
+       } else {
+           verbose "check_v3_target_thread_fence: compilation failed" 2
+       }
+    }
+    verbose "check_v3_target_thread_fence: $et_thread_fence" 2
+    return $et_thread_fence
+}
+
 proc check_v3_target_atomic_builtins { } {
     global cxxflags
     global DEFAULT_CXXFLAGS